/////////////////////////////////////////////////////////////////////////////////////
// Description:
//     Utility functions for time and date
//
// Legal Notices:
//     Copyright (c) 2008, Telliam Consulting, LLC.
//     All rights reserved.
//
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//       this list of conditions and the following disclaimer.
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//     * Redistributions in binary form must reproduce the above copyright notice,
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//       may be used to endorse or promote products derived from this software
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#include <FusionWare\Utilities.h>

namespace FusionWare
{
    const unsigned int Utilities::MonthTable[2][12] = {
        {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, // Normal year
        {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}  // leap year
    };

    // TODO:
    //     consider optimizing this by removing the modulo
    //     arithmetic
    //
    int Utilities::IsLeapYear(int year)
    {
        // If it's not divisible by 4 then it's not
        // a leap year.
        if((year % 4) != 0)
           return 0;

        // if it's not on a century boundary then it's a leap year
        if((year % 100) != 0)
            return 1;

        // every 400 years is not a leap year!
        return (year % 400) ? 0 : 1;
    }

    bool Utilities::IsDateValid(const SYSTEMTIME* pSysTime)
    {
	    return !((pSysTime->wYear < 1601) ||
		         (pSysTime->wMonth < 1) ||
		         (pSysTime->wMonth > 12) ||
		         (pSysTime->wDay < 1) ||
		         (pSysTime->wDay > 31) ||
		         (pSysTime->wHour > 23) ||
		         (pSysTime->wMinute > 59) ||
		         (pSysTime->wSecond > 59) ||
		         (pSysTime->wMilliseconds > 999));
    }
}